Facebook and Google have decided to ban fake news sites from using their advertising networks. Again, this seems like something that would have been useful a few months ago, but it’s a good step in the right direction.

Google kicked off the action on Monday afternoon when the Silicon Valley search giant said it would ban websites that peddle fake news from using its online advertising service. Hours later, Facebook, the social network, updated the language in its Facebook Audience Network policy, which already says it will not display ads in sites that show misleading or illegal content, to include fake news sites.